api.sehavniva.no have been replaced by vannstand.kartverket.no: Please use https://vannstand.kartverket.no/tideapi_en.html
api.sehavnivå.no is no longer supported, as notified via Geonorge, and will not be operative after September 19: https://register.geonorge.no/varsler/vannstand-api/2ede2455-47e0-49ff-9191-68f598429ab0
